How to calculate the Sod's Law Rating of a task

1. Rate the urgency, importance and complexity of the task on a scale of 1 to 9 and add these figures together.
2. Rate how skilled you are at the task. Subtract this from 10.
3. Multiply your answers to steps 1 and 2 together and divide by 20.
4. Rate from 1 to 9 how frequently you perform the task and divide this by 10.
5. Calculate the sine value of your answer to step 4 (you’ll find this a ‘sin’ on most calculators) and subtract this from 1.
6. Divide 1 by your answer to step 5.
7. Finally, multiply your answer to step 3 by 0.7, and then multiply this by your answer to step 6. Voila - you have your Sod’s Law rating.
8. The closer to 10 it is, the higher your risk of falling victim to Sod’s Law.

Source

x*x + y*y*1.5 + 1.5*abs(x)*y - 1000 < 0

Go here and see.

Chess Board Maths

A chess board has 64 squares. Pick numbers between 1 and 64 and place these numbers on each of the squares of the chess board such that the value in every square is the average of the values of its neighboring squares.

Can you figure it out?